[What causes high blood pressure, what diseases can it cause, and what should I do? ] High blood pressure is a common disease, #about 80% of high blood pressure is related to an unhealthy lifestyle#, high blood pressure means that the blood pressure on the walls of your arteries tends to be too high. Although your blood pressure can vary throughout the day, generally systolic blood pressure should be below 120 mmHg and diastolic blood pressure should be below 80 mmHg. If your systolic blood pressure is regularly above 140, or your diastolic blood pressure is regularly above 90, you have high blood pressure. (via@T Jun Said)